Offset printing machine



FIG. 1 is a front, top and right side perspective view of an offsetprinting machine showing our new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a top plan view thereof.

The ornamental design for an offset printing machine, as shown anddescribed.